It looks like you're trying to calculate the target heart rate for exercise using a formula based on age. The formula for determining the target heart rate zone typically involves the following steps:
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Calculate your maximum heart rate (MHR): \[ \text{MHR} = 220 - \text{age} \]
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Determine your target heart rate zone: Generally, the target heart rate zone for moderate-intensity exercise is 50% to 70% of your maximum heart rate. For vigorous intensity, it can be 70% to 85%.
Using the MHR from the first step:
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50% of MHR: \[ \text{Target HR (50%)} = \text{MHR} \times 0.50 \]
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70% of MHR: \[ \text{Target HR (70%)} = \text{MHR} \times 0.70 \]
So, the target heart rate range can be calculated as: \[ \text{Target HR Range} = [\text{MHR} \times 0.50, \text{MHR} \times 0.70] \]
For example, if you are 30 years old:
- Calculate MHR: \[ \text{MHR} = 220 - 30 = 190 \]
- Calculate target heart rate range: \[ \text{Target HR (50%)} = 190 \times 0.50 = 95 \] \[ \text{Target HR (70%)} = 190 \times 0.70 = 133 \]
Therefore, the target heart rate range for a 30-year-old would be approximately 95 to 133 beats per minute.
If you would like to calculate this for a specific age, just let me know!
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